Compensating gang sawing-machine



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A. J. WILGOX.

OOMPENSATING GANG SAWING MAGHINE.

No. 420,849. Patented Feb. 4, 1890.

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UNITED STATES PATENT O IC ALFRED J. WVILOOX, OF MUSKEGON, MICHIGAN.

COMPENSATING GANG SAWlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 420,849, dated February4, 1890.

Application filed April 9, 1889. Serial No. 306,501. (No model.)

To to whom it may concern:

Be it known that I, ALFRED J. WILCOX, a citizen of the United States,residing at Muskegon, in the county of Muskegon and State of Michigan,have invented certain new and useful Improvements in Compensating GangSawing-Machines; and I do hereby declare the following tobe a full,clear, and exact descrip-v tion of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My present invention relates to an improvement in sawing'machinery forthe manufacture of lumber, the object of the invention beingto soconstruct the mechanism thereof that it may have a compensating move--ment; and it consists, essentially, of any ordinary and common gang .ofreciprocating saws with the usual actuating mechanism therefor andsuitable counter-balances, so that the motion may be made steady anduniform and for other reasons, substantially as will be hereinafterdescribed and claimed.

In the annexed sheet of drawings I have represented a sawing-machine inside elevation, together with the mechanism for actuating the same,which is provided with my improved counterbalancing or compensatingdevices.

In the draWing,I denotesa cant orlog upon which the saw or saws J areacting for the purpose of cutting the same into lumben H denotes themill-floor.

It will be noted that the saws J reciprocate vertically and that themechanism for actuating the same is arranged in the usualmanner beneaththe mill-floor. This mechanism for actuating the saws consists,essentially, of the steam-cylinder A, containing a piston whose rod 13reciprocates in a horizontal direction and carries at its outer end thecross head 0, to which is pivotally connected the engine-pitman D.

E denotes the main shaft, on Which is mounted the counterbalancingdevice F, made of any suitable size and shape, it being very muchheavier upon one side of the shaft than it is upon the other sidethereof. To this latter and smaller port-ion of the counter balance Fthe engine-pitman D is pivotally connected by means of the pivot 11 orby some other similar and suitable device. The gangpitman G is alsoconnected to the counter-balance F at a point opposite to its heaviestpart, and is shown in the drawing as being attached to saidcounter=balance by means of the pivot b. The gang-pitman G is connectedto the lower end of the gate for the reciprocating saw or saws by meansof the connection a, as shown in the drawing.

The cross-head O is made of suitable size, shape, and weight, so as toproperly balance the counter-balance F, so that when the machine isrunning rapidly there will be no swaying motion to overcome and no heavyfoundation will be required to uphold and properly support the severalparts of my machinery, and so that the motion of the mechanism duringthe operation of the saw may be simple, uniform, and steady, and notsubject to jerks or fluctuations.

From this description of the construction of my improvedcounterbalancing mechanism for reciprocating sawing-machines it will beseen how extremely simple and effective the same will be in operation.As the cross-head 0 moves back and forth horizontally and rotates thecounterbalancing device F on the shaft E, it will be evident that thecontinued rotation of this part F will give to it oonsiderable momentum,which will be sufficient to carry the gang of saws past the center whenthey are in an exactly-balanced condition. Since the crosshead O is madeheavy itwill balance the counterbalanceweight F, and the motion of theseveral parts will be even and uniform My improved machinery Willtherefore be cheap in construction and efiective in operation, and theadvantages to be subserved by the use thereof, as hereinabove detailed,will be evident to any one skilled inthe art.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

The combination of the saw-gang J, the

main shaft E, the counter-balance F, mounted thereon, said counter abalance being constructed, as described,with the part on one side of theshaft much heavier than the part on the other side thereof, thegang-pitman G, connected to the saws and pivotally attached to thesmaller portion of the counterbalance F,

the engine cylinder, its piston and piston:

rod, the heavy cross head carried by said rod,

said cross-head and the counter-balance being In testimony whereof Iaflix my signature in suitably proportioned as to Weight, and thepresence of two Witnesses. en gine-pitman connected to the eross-headand pivotally attached to the smaller portion ALFRED J. \VILCOX. 5 ofthe counter-balance near the pivotal e011- neetion of the gang-pitnian,all of said parts Vitnesses: being combined and operating substantiallyARTHUR JONES, in the manner and for the purpose described. A. \V.EGGERT.

